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Google: Gemini 3.5 Flash vs OpenAI: GPT-5 Nano

Summary

Gemini 3.5 Flash vs GPT-5 Nano benchmark comparison: Gemini 3.5 Flash leads on average score with 6.8 vs 6.7. GPT-5 Nano has the lower benchmark cost at $0.081 vs $0.108. Gemini 3.5 Flash is faster at 1.57s vs 42.51s, with pass rates of 68.3% vs 57.1%.

Recommended model: Gemini 3.5 Flash - It has the best score here (6.8), while responding about 27.0x faster than GPT-5 Nano.

Last updated at: 2026-06-12

Metric Gemini 3.5 Flash Gemini 3.5 Flash minimal Release: 2026-05-19 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.8 6.7
Rank #71 #79
Reliability 10.0 10.0
Consistency 9.6 7.3
Tests Correct
Attempt pass rate 68.3% 57.1%
Flaky tests 1 7
Total Runs 63 63
Cost per result 0.767 0.897
Total Cost $0.108 $0.081
Input Price $1.500 / 1M $0.050 / 1M
Output Price $9.000 / 1M $0.400 / 1M
Total Input Tokens 39,847 34,108
Output Tokens 5,277 5,464
Reasoning Tokens 0 192,064
Response Time (avg) 1.57s 42.51s
Response Time (max) 5.51s 204.02s
Response Time (total) 33.02s 595.09s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#71 Gemini 3.5 Flash

minimal
Cost
$0.041
Time
20.4s
Tokens
4,608 tok

#79 GPT-5 Nano

medium
Cost
$0.006
Time
108.5s
Tokens
13,209 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 6.5 10.0 50.0% 0 892ms 492 405 0
GPT-5 Nano 6.5 7.9 58.3% 1 25.50s 606 1,221 21,184
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 5.6 9.9 33.3% 0 2.75s 8,122 3,456 0
GPT-5 Nano 7.0 7.7 55.6% 1 41.62s 7,305 740 41,152
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 3.56s 15,780 404 0
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 11,019 578 17,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.66s 7,548 279 0
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 7,140 453 10,560
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 899ms 633 12 0
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 619 237 64,448
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 922ms 486 117 0
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 477 202 4,608
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 6.4 5.8 66.7% 1 893ms 615 76 0
GPT-5 Nano 9.8 10.0 100.0% 0 15.64s 660 312 4,736
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.45s 558 282 0
GPT-5 Nano 5.3 7.2 44.4% 1 20.63s 642 929 14,272
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.79s 5,457 234 0
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 5,445 558 6,976
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 1.76s 156 12 0
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 195 234 6,144

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